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ALBERT n'. soUTHWIoK, or osKALoos-A, IOWA.

Letters Pfltent No. 76,261, dated March 31, 1868.

IMPROVEMENT IN WINDMILLS.

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To ALLv WHoM 1T MAY ooNonnN:

Be it known that I, ALBERT H. SOUTHWICK, of Oskaloosa, in the county ofMahaska, and in the State ot' Iowa, have invented certain new and usefulImprovement in Windmills; and do hereby declare that the following is afull, clear, and exact description thcreot`,rcference being had to theaccompanying drawings, and to the letters of reference marked thereon.

In the annexed drawings, making partof this specification, A, B, and Crepresent three platforms, which are placed a suitable distance apart,and -connected by means of lthe four postsl) D at their corners. Erepresents a. wind-wheel, which may be made with straight buckets, a ortheymay be curved, and set at any suitable angle. F represents the shaftof this wheel, said shaft having one bearing 'in the upper platform, C,and one in the lower one, A. G G represent a series of slats, which arepivoted at the centres of each of their ends, at equal distances apartbetween the platforms B and C, and in a circle around the wheel E',These slats are all connected together by a series of rods, H H, asrepresented, so that when one partially revolves upon its pivots, all ofthe balance have the same motion. These slats are so arranged that, whenthey are turned upon their pivots inthe direction ot' the arrows, Figure1, their outer ends lapl the inner ends of the slats next to them, andthus close the wind-passages to the wheel.V When these slats are opened,as seen in tig. 1, the wind has a lfree passage between them to thewheel E. N represents a governor-shaft, which stands in a verticalposition, having bearings in the platforms'A and B, as seen. -P Prepresent the usual governor-arms, with pawls .upon their outer ends,and their inner ends pivoted to the-shaft-Nl Y e e representconnecting-hars, their upper ends being pivoted to the arms P P, andtheir lower ends to a sliding collar, O. d represents a belt, whichpasses around a. pulley on the shaft F, and then around one on thegovernor-shaft N. L represents a lever, forked at one end, so as to,embrace the collar O, being pivoted at this forked end to said collar.The lever L has its fulcrum in the upright, M, and to its outenendconnects a. rod, K, which connects it to one end of an elbow-lever, J,said lever J having its fulerum in a slot in the platform 13,V A rod, I,connects the upper end of lever J tothe series of rods H, -which connectthoslats together. The'ohjeot of this arrangement is to control theair-passages to the wheel by opening or closing the slats G G.

It will .readily be seen that when thc wind-wheel revolves, its shaft,through band d, gives'motion to the governor-shaft N, and that the moremotion is. given to this shaft, the nearer will the balls of arms P andthe arms themselves be thrown toward a-horizontal pla-nc, through theirpoints ot' connection with the shaft. As the arms P rise, so does thecollar O. This collar, operating the lever L, causes it,through itsconnections, to operate upon the slats G G, closingthem when the wheelruns at a highrate of speed, and opening them as this speed isdiminished, thus regulating the amount of wind which passes to the wheelE according to the required speed. v

Having thus fully described myin'vc-ntion, whatl claim as new, anddesire to secure by Letters Patent, is-,

The arrangement of the platforms B C and wheel-E with the shutters G G,connected together by the fastenings q q and rods H H, and combined witha governor, substantiallyas and -for the purposes set forth.- Intestimony that I claim the foregoing, I have hereunto set my hand, this6th day of June, 1867.

ALBERT H. SOUTHWICK.

Witnesses:

Roer. Krssrcx, Y.' B. WILSON.

